[takeda]

First is whether you can trust it, second yes, their privacy states that they don't log IP, and frankly with dynamic IP it isn't really that much valuable anyway. The other information together can tie that to you as a person. Combined with other information that you are disclosing when using their services (since their policy changed many years ago, to allow sharing data between their services) they know exactly who you are and what you're doing on the net.

I really don't understand why those DNS services are so popular. All you need is list of 13 root DNS servers[1] (you only need one, but 13 for resiliency) and a recursive resolver and you can run your own caching server.

[1] https://www.iana.org/domains/root/servers